Gatecrasher is an alien that is endowed with superhuman strength, stamina, and durability due to her size and build. She has the ability of telepathy, the limits of which have not been established. Gatecrasher has also demonstrated skills in biogenic nucleotronic splicing.
Gatecrasher usually wears wrist-blasters that fire an unknown form of energy. Her main mode of transportation is teleportation.

Gatecrasher is a bounty hunter, and the leader of the Technet. She is a tall, massive blue-skinned female.
Gatecrasher was hired with the Technet by Opul Lyn Sat-Yr-Nin to capture the extra-dimensional fascist Kaptain Briton. Gatecrasher and the Technet mistakenly captured Earth-616's Captain Britain instead, but then helped him escape. Gatecrasher was later sent to 14th century Earth, and tricked by an enemy into ingesting lethal parasites. She was saved from death by Captain Britain and Meggan.
Later, Gatecrasher and her Technet were sent by Saturnyne to capture Rachel Summers, the Phoenix. The mercenaries encountered the group of heroes who would become known as Excalibur after their confrontation with the Technet. Gatecrasher then established a new base in Brighton, England for the Technet. She was hired by Nigel Frobisher, acting on behalf of a woman appearing to be Courtney Ross, to rescue Jamie Braddock from the African despot Doctor Crocodile.